Help: Harmonic Balancer/crankshaft sensor issue | Ford Explorer - Ford Ranger Forums - Serious Explorations

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Help: Harmonic Balancer/crankshaft sensor issue

JNA

New Member
Joined
May 9, 2014
Messages
1
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City, State
San Diego, CA
Year, Model & Trim Level
04 EB
I have an 04 4.0 and I installed a new Dorman harmonic balancer to help with a rough idle issue. Now I am getting random misfire codes (P0300, P0301, P0305). I have brand new plugs and wires (motorcraft) and tested the coil pack.

Do I have to replace the Crankshaft sensor for the new balancer?

Is there a way to adjust the sensor?

Thanks for the help
 




vipersinu2

Well-Known Member
Joined
March 10, 2008
Messages
645
Reaction score
14
City, State
The Big City of Orange City, Florida
Year, Model & Trim Level
2019 Navigator 450hp
Crank sensor is the same. Compair the length of the old spark plug to the new spark plug. Also check for intake leak could be sucking air. Also check orings on injectors.
 




cross6

Well-Known Member
Joined
February 26, 2008
Messages
268
Reaction score
1
City, State
Baton Rouge, LA
Year, Model & Trim Level
2004 Mountaineer
The updated dorman/ford balancers have a pretty fragile tone ring for the crank sensor. Some of them get bent in shipping/handling. Some also came with faulty ones. Check it out.
 




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